War is not necessarily carrying guns and missiles ,these days wars are been fought with wisdom not with bombs and riffles, there something we call economic war ,Ban and sanction like we experience all nations against russia not necessarily done violently but with wisdom to affect it economy ,once money is not in circulation again it will lead to protest by his people against his government for dissatisfaction.
I would disagree with a part of that. Economic warefare is nothing new, the Hundred Years' War (1337 - 1453) was more of an economic war than an all out battle. Naturally, economic wars were a bit diferent back then, but it's still the same concept. What I do agree is that it's nothing like the wars of the oast century as it implements more cyber warefare.
The reason behind most of the wars is the economy. It was because of land, wealth or power mostly. All the superpowers want to become number one in the world economy because it helps them carry out their influence all over the world. For hundreds of years, war was mostly political, not economic. The power struggle between two noble families to get each other thrown out. There was little economic interest, I think.